[Face Up.]

I mean, you're almost on your way out. But I wouldn't slack off now. Most colleges DO ask for your final transcripts, so definitely don't slack off and think that just because you've been accepted to colleges, you can do whatever you want in your classes without consequences. That will hurt you later.

I don't think you're hurrying your life either. As Lelola said, you won't magically become more mature when you graduate. You still can have fun with your life and this is still the time of your life where you can explore and really discover who you are. Of course you'll have your studies to focus on too, but there's still time for fun!